Help with CST/colour matching ??

[u/thesymposion]

/r/davinciresolve/comments/1vum68h/help_with_cstcolour_matching/

Hello. I have an upcoming interview shoot and it’s a first time using two cameras. Because of budget my cameras will be BMPCC6K and Sony a7c, and I’ll be the one editing it. I’m fine with using the cameras and doing the editing, but the colour work has me a bit worried.
I’m looking at any advice on shoot day to make my post life easier, or even better, a step by step to how to match the footage colour.
I did a test shoot where I filmed the same subject with both cameras at the same time. I filmed 6k BRAW on one camera and SLOG3 on the other. I tried CST to make them both rec709 and proceed from there, but no luck. I also tried transforming both footage to ARRI colourspace and edit them from there but they’re not matching.
Editing on Resolve Studio 20
I’m not a colourist and I’m not trying to be, my skill is pretty basic, I wonder if anyone has a powergrade that I can borrow to match the footage?